▎ 摘　　要

NOVELTY - Preparing tin-based/carbon lithium ion battery cathode material comprises (i) dissolving graphene oxide in deionized water, ultrasonically dispersing to form graphene oxide solution, (ii) dissolving tin tetrachloride and thiourea in above graphene oxide solution, and continuously stirring ultrasonically at room temperature, (iii) freezing solution obtained in step (ii), and vacuum freeze-drying to obtain precursor, and (iv) grinding and calcining precursor under protective atmosphere. USE - The method is useful for preparing tin-based/carbon lithium ion battery cathode material. ADVANTAGE - The method solves the problems of complicated preparation process brought by hydrothermal method and solvothermal method, and is simple; and cathode material particles are uniform and fine, and has excellent cycle capacity and electrochemical performance.